Remove max_complextiy and max_depth calls

These values are always set dynamically within `#multiplex` based on the
`current_user`. Previously `#multiplex` was overriding them. It's less
confusing to simply not call them at all, to avoid people needing to
understand how these calls affected the resulting `max_complextiy` and
`max_depth` (they didn't).

app/graphql/gitlab_schema.rb

@@ -20,9 +20,6 @@ class GitlabSchema < GraphQL::Schema
   query_analyzer Gitlab::Graphql::QueryAnalyzers::LoggerAnalyzer.new
   query_analyzer Gitlab::Graphql::QueryAnalyzers::RecursionAnalyzer.new
 
-  max_complexity DEFAULT_MAX_COMPLEXITY
-  max_depth DEFAULT_MAX_DEPTH
-
   query Types::QueryType
   mutation Types::MutationType
   subscription Types::SubscriptionType